Horn Lake, MS Accessory Structures: Garage Conversions (2026)

Horn Lake Planning and Development administers building permits and zoning compliance from 3101 Goodman Road West. A garage-to-living-space conversion is a change of use that requires a residential building permit (with electrical, mechanical, and plumbing sub-permits as applicable) and zoning verification before construction begins. The completed space must comply with the Mississippi State Building Code (Mississippi Code Section 17-2-1 et seq.), which adopts the International Residential Code: minimum 7-foot ceiling height for habitable rooms (IRC R305), egress window in any new sleeping room (IRC R310), interconnected smoke and carbon monoxide alarms (IRC R314/R315), and insulation meeting the adopted IECC. Zoning review under Appendix A confirms the conversion still meets the residential off-street parking minimum (Article XI), maximum lot coverage, and accessory-use rules; eliminating the only enclosed parking required by the underlying district will block approval. Mississippi has no statewide ADU preemption, so a single-family lot generally cannot be converted into a two-unit rental absent a use change. Schedule inspections through the Planning Clerk at (662) 342-3549.